bug#48710: Retaining code highlighting (for defun, defvar) in outline mode

bug#48710: Retaining code highlighting (for defun, defvar) in outline mode

[pauline-galea]

Currently outline mode changes the colour of headings and subheadings.

But I have noticed that elisp structures are also considered as headings.
This results in some code highlighting problems for things like "defun"
and "defvar" because the whole line gets a one colour highlighting in
a way that is similar to a heading face.

It would be better that elisp code structures retain the original code highlighting,
but keep the ... at the end of the line to show that the code body is hidden.
The ... could be highligted instead instead.

For more flexibility, it would be beneficial to have a separate keybinding that toggles
between showing the contents (body) of a code structure and hiding it, that is independent
of headings.

bug#48710: Retaining code highlighting (for defun, defvar) in outline mode

[Juri Linkov]

tags 48710 notabug
close 48710 28.0.50
thanks

> Currently outline mode changes the colour of headings and subheadings.
>
> But I have noticed that elisp structures are also considered as headings.
> This results in some code highlighting problems for things like "defun"
> and "defvar" because the whole line gets a one colour highlighting in
> a way that is similar to a heading face.
>
> It would be better that elisp code structures retain the original code highlighting,
> but keep the ... at the end of the line to show that the code body is hidden.
> The ... could be highligted instead instead.
>
> For more flexibility, it would be beneficial to have a separate keybinding that toggles
> between showing the contents (body) of a code structure and hiding it, that is independent
> of headings.

It seems this is already implemented: when you customize
outline-minor-mode-highlight to a value 't' or 'append' (but not 'override'),
and also customize outline-minor-mode-cycle to t, then after
enabling outline-minor-mode, and typing S-TAB S-TAB on a heading
it keeps the ... at the end of lines, while
retaining the original code highlighting.

Please reopen this report, when you still see a problem
and can't get it working.